Improvement in stoneware-kilns



C.GLADDING. Stone-Ware Kiln.

No. 197,626. Patented Nov. 27,1877.

....Mnuwwwm Inventor tnesses NPETF.RS, PHCTO-LITHOGRAPHER, WASHINGTON.lrilA UNITEDl STATES PATENT FFIGE.

CHARLES GLADDING,-OF LINCOLN, CALIFORNIA.-

IMPROVEMENT IN STONEWARE-.KI LNS.

Specication forming part of Letters Patent N 0. 197,626, dated November27, 1877 application filed A July 30,1877.

To all whom 'it may concern:

Be it known that I, GHARLns GLADDING, of Lincoln, county of Placer, andState of California, have invented an Improved Stoneware-Kiln; and I dohereby declare the following to be a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings.

My invention relates to certain improvements in the construction ofstoneware and pottery kilns 5 and it consists inthe employment ofcertain dampers whereby the heat is regulated and the charged secondaryfurnaces are prevented from burning until desired, and by which allingress of cold air to the kilns is prevented while these fires arebeing lighted.

In the accompanying drawings, Figure l is a perspective View of myfurnace. Fig. 2 is a longitudinal section.

A is the main kiln, which is provided with a suitable number offurnaces, B, surrounding it, the kiln being made square, round, or inany convenient shape. The heat from these lires ascends through llues Cbuilt in the kiln to near its top, and then descends among the potteryor other contents of the kiln, escaping through slotted openings D inthe floor. These openings are connected with ilues E in the secondarykiln F, and the waste heat is thus carried to the upper part of thiskiln and descends among the contents of this kiln, partially burningthem, and thus utilizing all the heat before it finally escapes throughthe slotted openings G in the floor of this kiln on its Way to thechimney H, which produces the required draft.

After the burning in the kilnA is completed it will often requireadditional heat to complete the burning in the kiln F, and in order toeffect this without any admission of cold air, which would crack orinjure the contents, I construct furnaces I, which communicate with the.interior of the kiln F in the samemanner as described for the kiln A. p

These furnaces are all charged with the necessary fuel ready forlighting at the time when the kiln is lled and sealed up, and thisobviates the necessity of opening any passages for the entrance of coldair after the burning commences.

In order to prevent the fuel in the secondary kiln-furnaces from beingignited by the heat of the first kiln, I employ dampers J, whichentirely shut off all communication between the furnaces and the kiln.By this means I reserve these fires until the first kiln is burned off.

'While the dampers are still closed the ashpits of the furnaces I may beopened, and the fuel in these ignited. After these fires are burningwell the dampers J may be opened, and the heat, passing into the kiln F,will complete the work which was commenced by the waste heat from thekiln A.

The passages between A and F are provided-With dampersK, and the kilnF'to the chimney M has a damper, L, so that .the heat and draft may beperfectly regulated. A supplemental passage extends directly from thekiln A to the chimney, so that either kiln may be used separately. l

The proportional size of the kiln F as compared with A should be aboutsixty per cent., in order. to utilize the Waste heat to the bestadvantage. f

The slotted floor-openings Gin the kiln F should have an area of aboutninety per cent. of the area of the openings D in the kiln A, and whenthis latter kiln is made eighteen feet square, or with an equivalentarea, with the other parts proportional, as above, the chimney M shouldhave an area of about nine feet, and fifty feet of height. I have foundthat these proportions give the best results.

Having thus described my invent-ion, what I claim as new, and desire tosecure by Letters Patent, is-

The combination, with the kiln A, with its furnace, flues, and passages,as described, of the secondary kiln F, having the independent chargedfurnaces I, provided with the cut-olf dampers J, substantially as andfor the purpose herein described.

In witness whereof I have hereunto set my hand and seal.

y CHARLES GLADDING. [L. s] Witnesses:

JOHN DoNNELLY, A. J. GLADDING.j

